Novel IRF6 Mutations Detected in Orofacial Cleft Patients by Targeted Massively Parallel Sequencing

K. D. Khandelwal, N. Ishorst, H. Zhou, K. U. Ludwig, H. Venselaar, C. Gilissen, M. Thonissen, I. A. L. M. van Rooij, K. Dreesen, M. Steehouwer, M. van de Vorst, M. Bloemen, E. van Beusekom, J. Roosenboom, W. Borstlap, R. Admiraal, T. Dormaar, J. Schoenaers, V. Vander Poorten, G. HensA. Verdonck, S. Berge, N. Roeleveldt, G. Vriend, K. Devriendt, H. G. Brunner, E. Mangold, A. Hoischen, H. van Bokhoven, C. E. L. Carels*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Web of Science)

Abstract

Common variants in interferon regulatory factor 6 (IRF6) have been associated with nonsyndromic cleft lip with or without cleft palate (NSCL/P) as well as with tooth agenesis (TA). These variants contribute a small risk towards the 2 congenital conditions and explain only a small percentage of heritability. On the other hand, many IRF6 mutations are known to be a monogenic cause of disease for syndromic orofacial clefting (OFC). We hypothesize that IRF6 mutations in some rare instances could also cause nonsyndromic OFC. To find novel rare variants in IRF6 responsible for nonsyndromic OFC and TA, we performed targeted multiplex sequencing using molecular inversion probes (MIPs) in 1,072 OFC patients, 67 TA patients, and 706 controls. We identified 3 potentially pathogenic de novo mutations in OFC patients. In addition, 3 rare missense variants were identified, for which pathogenicity could not unequivocally be shown, as all variants were either inherited from an unaffected parent or the parental DNA was not available. Retrospective investigation of the patients with these variants revealed the presence of lip pits in one of the patients with a de novo mutation suggesting a Van der Woude syndrome (VWS) phenotype, whereas, in other patients, no lip pits were identified.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalJournal of Dental Research
Volume96
Issue number2
DOIs
Publication statusPublished - Feb 2017

Keywords

  • cleft lip
  • cleft palate
  • genetics
  • hypodontia
  • risk factor(s)
  • high-throughput nucleotide sequencing
  • POPLITEAL PTERYGIUM SYNDROME
  • REGULATORY FACTOR 6
  • WOUDE-SYNDROME
  • TOOTH AGENESIS
  • CAUSE VAN
  • LIP
  • FAMILIES
  • PALATE
  • GENE
  • FRAMEWORK

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